Tip: When determining a time limit, remember that players won't be as familiar with the level as you are. If you normally complete the level with the timer around 100, others might run out of time on their first try.
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Details for Converting a MarioPaintComposer compisition manually into Custom Music Tutorial
Documents - Converting a MarioPaintComposer compisition manually into Custom Music Tutorial
Since this is possible, and fairly simple, I feel like it'd be great to make a simple program that just does this. I even think songs where more than one note plays at a time would be easy to make into multi-channel compositions. If any programmer wanted to try it, I'd be happy to help out.